Entries in Nabisco
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Tim Boyle/Getty Images(NEW YORK) -- Get your glass of milk ready for dunking: the Oreo turns 100 years old on Tuesday.

Created on March 6, 1912, in a National Biscuit Co. bakery in Manhattan, the sandwich cookie has come a long way from its first sale to a grocer by the name of S.C. Thuesen in Hoboken, N.J.

Now an international favorite, Oreos can be bought in more than 100 countries and rake in $1.5 billion in global annual revenues. More than 95 million cookies are sold each day.

Becky Tousey, Kraft Foods' corporate archivist, said the brand's message has maintained the same theme in its advertising over the years.

"The focus of advertising was on the fun of eating Oreos, the fun of the parts of the Oreo," she told ABC News. "It has that theme of the enjoyment -- the twisting, the licking, the dunking. For me, as a historian, it's fun to see that thread throughout."

The cookie's popularity has endured at least five design changes along with the National Biscuit Co.'s name change to Nabisco and the eventual takeover by Kraft Foods.

"It's always been a top seller -- if not, the top seller for quite a few decades," Tousey said of the Oreo brand. "Even early on, it became clear to the National Biscuit Co. that it was one of its flagship brands and the company really supported it. ... [Oreo] has demonstrated decade after decade that it continues to endure."